chris stevens and three other americans were killed in the attack. before last month's attack in benghazi special teams arrived throughout north africa. they were positioned to quickly strike a terrorist target or rescue a hostage. anonymous counter terrorism official said they were not ready to respond. u.s. and mexican authorities are searching for suspects in the murder of a u.s. border patrol agent. nicholas ivie was responding to an alarm in a heavily trafficked drug corridor. he was shot to death and another agent was wounded. it's the first fatal shooting of a border agent since 2010. authorities believe more than one person fired on the agents. >>> american airlines says improperly installed seat clamps is the reason why seats came loose. american is inspecting their seats. the clamps that have been incorrectly installed. four other planes have had the same problem. in past week rows of seats have come loose during three american flights. federal aviation officials are investigating. cbs money watch time on a wednesday. car sales shift into h